Electric switch.



110,847,007. PATENTED MAR. 12, 1907. I. KITSEE.

ELECTRIC SWITCH. APPLICATION FILED MAR. 19, 1904.

WITNESSES. INVENTOH ii'nrrnn eteorns'o SWETGH.

Specification of Letters-fatent.

Patented March 12, 1907.

Application filed March 19,1904 Serial llo. 198,908.

To ml whom, {It may concern:

' 3 Be it known that I, lemon Kirstin, ol, the

city and county of Philadelphia and State of Pennsylvania, have invented certain new and 5 useful Improvements in Electric $witches, of

which the following is a specification.

hly invention relates to an improvement in The object of my invention is to provide a jswitch of this character which will be so sim- ,5 ply constructed as to be made at a comparative small cost, and the parts oi the switch will be so few in number that it will not be liable to get out of order easily, while the same will be cntirclydurable and ctlicicnt in action and will meet all the requirements doma'nded of switches of this description.

My device consists, essentially, of the features and arrangements, as will hereinafter be more fully described, illustrated in the I 2 5 drawing,

and more clearly pointed out in the claims following this specification. Referring to the drawing, Figure 1 rear elevation of my improved switch, showingthe parts in the condition they will sgosume when the contact is broken. Fig. a similar view to Fig. 1, showing the position of the parts when the contact is made and circuit established through the switch. Fig. 3 is an edge clevati on of the switch, the parts being in a position as shown in Fig. 1. Fig. 4 is a face view of the switch when the contact or circuit is broken.

A represents a face-plate, which I term the fstationary part of the switch, and this 40 lace-plate may be made of any suitable insulating material, or if the same is made ol conducting material it is understood that the different parts must be insulated. therefrom.

represents the movable part of the switch, made of conducting material. This movable member is pivoted to the stationary member A by means of the screw B, which passes through a slot Z1,fo11ncd to the member B. Thus while the movable 5'6 member is pivoted upon the screw B it also has a certain amount of longitudinal 'movement upon said screw, said longitudinal ggnovement being lmnted by the length. of the slot 1)..

longitudinally .C is a spring connected at one end to the movable member 5 and at the other end to the plate Act the point d. l

D D are two spring-contacts, to which the terminals of the wires leading to the switch are connected. These contacts are arranged upon opposite sides of the movable member B and are secured to the rear of the plate A. The spring G tends to hold the movable member B out of contact with the contacts D D.

d is a pin extending forward and secured to one end of the movable part B. This pin d protrudes through a slot a, the major portion of said slot being formed concentric with the pivotal point of the member B. A' knob E is secured upon theouter end of the pin d in front of the face-plate'A, and by moving the knob E to the limit of the slot a against the tension of the spring C connection and the two contacts D and D, thus establishing the circuit, and in order to hold the movable member in this position the slot a at this point is notched or cut away, so as to form an extension of the slot extending radially toward the pivotal point of the member B, thus forming a bayonet-slot, and the outer end of the s'pringU is secured to the plate a at point where the tendency of the spring is not only to cause the pin (1 to re: turn to the end of the concentric slot a, but will also tend to pull the pin d downward into the extension c of said slot, this movement being allowed. onaccount of the slot 6 in the movable member B. Thus when the pin (2 is lodged within the extension a of the slot the niovable member B will be held in and to break this connection it is only necessary to raise the knob E till the pin d is in alinement with the concentric portion of the slot a, when the spring C will act to draw the movable member away from both contactsprings, and thus break the contact.

It is well understood by persons versed in the art that the principal requirement in a switch of this character is that the circuit will be made and broken in a positive manner, so as to do away with all liability of arcing, and in this switc it will be seen that this is accomplished, for unless the movable member is moved in positive contact with the two con tact-pins it is impossible for the spring to lock the switch by pulling the pin. downward into the extension a" of the slot through the plate, and if the movable member is not contact with the spring-contacts D and D,

will be made between the movable member B r knob E is pressed upward the spring instontly eats upon the movobiemcmbcr' to moved for enough to allow the spring to ac complish this locking the spring will instantly return the movable member to its original osition, when the finger is released from the mob.

Jitter the switch has been closed and the cause the some to move so as to make a posi tive and safe bzeol: in the circuit,

(if course l do not limit myself to the exact f construction es here illustrated, as slight modifications can be mode without departing from thesoope of my invention.

Having now described my in vontion, whet I claim as new, and desire to secure by Let E tors Potent, is

1. A switch of the class desci'ibed, coinprising e faceplate having it boyonetPslot l formed therein, anon of contacts arranged upon the mneiieoeof sold plate and spaced epert, said contacts forming circuit-tenor nels, o movable conducting member arranged between said contacts and adopted to open end close the circuit theretbrougli. said; 4 memberhovmg it loose pivotalconnect on i Witli the lace-plate to permit the member bowing limited slidm movement thereon, and

' a projection corded y said member and extending tbrougbseid slot for actuating; soirl member, said projection cooperating with said slot to lock the movable member in em gegement with said contacts.

2. A switch or the class describeo, comrisin o faceplate having a beyonctslot l 'orme therein, a pair oi contacts arranged upon the inner face oz said plate and spec-oil sport, sold contacts forming circuit-tennimale, on movable conducting member arranged e between said contacts and adopted to open i and close thecircuit tlieretbrougli, scid mem- 1 bet having it longitudinal slot, e pin wronged in said slot and connected to the faceplate whereby said member is pivotelly connecteii thereto but capable of limited sliding move ment thereon, at projection comical by sold member and extending through said bayonet slot for actuating said member, said projection cooperating with Sttlfl slot to look the movable member in engagement with said contacts, and e opting; for releasing; the mom able member from engagmncnt with the con tests when the rojection lms been released from its engage osition in the slot.

3. In on electric switch, a stctione-i'y mcmloci, e movable member pivot-ed midway be tween its two ends to said stationery membet, the movable member being provided wi'tb'e slot formed longitmlinally thereon,

some

I through which the pivotal pin extends, two 6,

l stationery COIltlGiloints adapted to be com? nected bytbe move is memberwhen the same isfnioveo in one direction, a spring tending to; move the movable member so as to breakcoxi "f nection, said sprin so connected as to move 16's the movable mom or longitudinally to the, limit of its slot, when the connection is mad between the two contoctpoints, and mo whereby the movable member is automatic oily locked in this position when so move and a knob secured to the movoble'membe r i for moving the some in the opposite. direct-' tion longitudinallv to allow the spring toiif bar, a movable "member, a longitudinalslot provided in the movable member, o piYot'ex-f tending through said slot into the stationary" able member is moved in one direction fa guidewgy formed in the stationary mom or concentric with the pivotal point"'of fthe movable member, a projection "extending, from the movable member and adopted to ride in said guidcwny, a spring connected to the movable member tending to hold the some so tlmt its projection is at one end of. tilt concentric slot when the contact isblfoken, 9'9 a notch formed at the other en'dof thzi'coni centric slot into which the projection isiforceil by the s ring when thecohtect is made between t o two contztct points, and 1 means secured to' the movable member for 5 raising the projection out of thcnotchand for moving the projection into al'in'ement $1311 the notch as and for the purpose speck 18K v l f v 5. An electric switch embi acing a support; to. i e'movoble conductor rovidcd witholongitil-fif dinal slot and pivots ly secured to saidoy, I port, a spring connected to the movable' qgli'o doctor andsnppoit respectively; e 'gu'ideway in the support, a projection from'th'e m'o'yab e mi} 3 conductoc extending through said "guidoway said guidewey terminating iii-a notchfstal tionery contacts adapted to be secured to 0 11Tcnt-ccrrying circuit and means toumoi' to end fro said movable conductor; A In testimony whereof I hereby sign my some, in the presence of two subscribing wits messes, this 18th day of March, A. D. 1904.

] isIDoR KITSEEM 1 to be electrically connected when theg mozwl Witnesses:

Eni'ru R. STILLEY,

H. G. Yi-z'r'rnn.

4. In on electric switch, a, stationary mem port, twostzltionory contact points adapted-:8: 

